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/* -*- Mode: C; c-basic-offset: 3 -*-
*
* pci.h - Simple PCI configuration interface. This implementation
* only supports type 1 accesses to configuration space,
* and it ignores the PCI BIOS.
*
* This file is part of Metalkit, a simple collection of modules for
* writing software that runs on the bare metal. Get the latest code
* at http://svn.navi.cx/misc/trunk/metalkit/
*
* Copyright (c) 2008-2009 Micah Dowty
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef __PCI_H__
#define __PCI_H__
#include "types16.h"
#pragma pack(push)
#pragma pack(1)
typedef union PCIConfigSpace {
uint32 words[16];
struct { // offset
uint16 vendorId; // 0
uint16 deviceId; // 2
uint16 command; // 4
uint16 status; // 6
uint16 revisionId; // 8
uint8 subclass; // 10
uint8 classCode; // 11
uint8 cacheLineSize; // 12
uint8 latTimer; // 13
uint8 headerType; // 14
uint8 BIST; // 15
uint32 BAR[6]; // 16
uint32 cardbusCIS; // 40
uint16 subsysVendorId; // 44
uint16 subsysId; // 46
uint32 expansionRomAddr; // 48
uint32 reserved0; // 52
uint32 reserved1; // 56
uint8 intrLine; // 60
uint8 intrPin; // 61
uint8 minGrant; // 62
uint8 maxLatency; // 63
};
} PCIConfigSpace;
typedef struct PCIAddress {
uint8 bus, device, function, padding;
} PCIAddress;
typedef struct PCIScanState {
uint16 vendorId;
uint16 deviceId;
PCIAddress nextAddr;
PCIAddress addr;
} PCIScanState;
#pragma pack(pop)
// BAR bits
#define PCI_CONF_BAR_IO 0x01
#define PCI_CONF_BAR_64BIT 0x04
#define PCI_CONF_BAR_PREFETCH 0x08
uint32 PCI_ConfigRead32(const PCIAddress FARP *addr, uint16 offset);
uint16 PCI_ConfigRead16(const PCIAddress FARP *addr, uint16 offset);
uint8 PCI_ConfigRead8(const PCIAddress FARP *addr, uint16 offset);
void PCI_ConfigWrite32(const PCIAddress FARP *addr, uint16 offset, uint32 data);
void PCI_ConfigWrite16(const PCIAddress FARP *addr, uint16 offset, uint16 data);
void PCI_ConfigWrite8(const PCIAddress FARP *addr, uint16 offset, uint8 data);
Bool PCI_ScanBus(PCIScanState FARP *state);
Bool PCI_FindDevice(uint16 vendorId, uint16 deviceId, PCIAddress FARP *addrOut);
void PCI_SetBAR(const PCIAddress FARP *addr, int index, uint32 value);
uint32 PCI_GetBARAddr(const PCIAddress FARP *addr, int index);
uint32 PCI_GetBARSize(const PCIAddress FARP *addr, int index);
void PCI_SetMemEnable(const PCIAddress FARP *addr, Bool enable);
uint32 PCI_GetSubsystem(const PCIAddress FARP *addr);
#endif /* __PCI_H__ */
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